[Veritas-bu] Veritas-bu Digest, Vol 5, Issue 71
2006-09-25 12:11:07
Subject: |
[Veritas-bu] Veritas-bu Digest, Vol 5, Issue 71 |
From: |
jroyer at digitalmotorworks.com (Joe Royer) |
Date: |
Mon, 25 Sep 2006 11:11:07 -0500 (CDT) |
LTO2 can expect 60-70MB/s at 2:1 compression (range depends on drive
manufacturer), anything above that is gravy. Granted, it's not uncommon
for me to see 580GB on a 200/400 LTO2 tape, it's not something you can
depend on. The spec says 30-35/60-70 for LTO2 with/without compression.
I can't seem to find a URL for a pre-written comparison, I may have to
write one. Here are the details:
LTO2 native/compressed MB/s
IBM 17.5-35/70
HP 10-32/64
Seagate 12-34/68
And keep in mind, if you try to hardware compress software compressed
data, it will be slower and the tape will hold less.
----Original message----
Date: Fri, 22 Sep 2006 09:54:15 -0400 (EDT)
From: Justin Piszcz <jpiszcz at lucidpixels.com>
Subject: Re: [Veritas-bu] LTO3 and Disk Staging
To: "Weber, Philip" <Philip.Weber at egg.com>
Cc: veritas-bu at mailman.eng.auburn.edu, Ed Wilts <ewilts at ewilts.org>
Message-ID: <Pine.LNX.4.64.0609220953530.3623 at p34.internal.lan>
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
The drive limit of LTO2, I have benchmarked at speeds of 90-94MB/s,
sustained. Around 137-138MB/s for LTO3.
Justin.
--
Joe Royer / SysAdmin / Digital Motorworks / 512-692-1028
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